Dulce de Leche Chocolate Banana Muffins

INGREDIENTS

• 6 tablespoons unsalted butter, softened
• 1/2 cup granulated sugar
• 1/4 cup prepared dulce de leche
• 1 egg
• 1/2 teaspoon pure vanilla extract
• 3 medium over ripe bananas
• 1 1/4 cups all-purpose flour
• 1/4 cup unsweetened cocoa powder
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 1/4 teaspoon kosher salt
• 1 1/2 cups mini chocolate chips